Whittier (CA)
September
Weather in Whittier, California for September 2026
Your guide to Whittier weather in September - trends and predictions
So far, September 2026 in Whittier is slightly warmer than the historical average by 0.6 °F.
The forecast for the upcoming days in Whittier predicts a temperature of 32.9 °F, which is slightly above the historical average.
In general, the average temperature in Whittier at the beginning of September is 34.6 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 32.3 °F by the end of September.
Precipitation in Whittier during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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29
Dry days
1
Rainy days
0
Snow days
29°/20°
Temperatures
17 km/h
Avg max wind
58 %
Avg humidity
Whittier Weather September
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Temperatures trend during September in Whittier
See the weather trend as well as the moving average line
September weather in Whittier day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 33° /20° | 0 mm | 9 | |
| Sept. 2 | Sunny | 34° /21° | 0 mm | 9 | |
| Sept. 3 | Sunny | 34° /22° | 0 mm | 9 | |
| Sept. 4 | Sunny | 33° /21° | 0 mm | 9 | |
| Sept. 5 | Sunny | 36° /21° | 0 mm | 9 | |
| Sept. 6 | Sunny | 35° /22° | 1.8 mm | 7 | |
| Sept. 7 | Sunny | 37° /22° | 0.4 mm | 7 | |
| Sept. 8 | Sunny | 38° /24° | 0 mm | 9 | |
| Sept. 9 | Sunny | 35° /24° | 0 mm | 7 | |
| Sept. 10 | Sunny | 31° /22° | 0 mm | 7 | |
| Sept. 11 | Sunny | 28° /20° | 0 mm | 7 | |
| Sept. 12 | Sunny | 27° /19° | 0 mm | 7 | |
| Sept. 13 |  Cloudy | 27° /19° | 0 mm | 7 | |
| Sept. 14 | Cloudy | 29° /18° | 0 mm | 8 | |
| Sept. 15 |  Partly cloudy | 28° /18° | 0 mm | 8 | |
| Sept. 16 |  Patchy rain possible | 28° /19° | 0.1 mm | 8 | |
| Sept. 17 | Sunny | 26° /18° | 0 mm | 7 | |
| Sept. 18 |  Overcast | 26° /19° | 3.8 mm | 7 | |
| Sept. 19 | Sunny | 27° /18° | 0 mm | 7 | |
| Sept. 20 | Overcast | 26° /17° | 0 mm | 5 | |
| Sept. 21 | Sunny | 26° /20° | 0 mm | 7.3 | |
| Sept. 22 | Sunny | 28° /19° | 0 mm | 7.3 | |
| Sept. 23 | Sunny | 32° /21° | 0 mm | 7.3 | |
| Sept. 24 | Sunny | 32° /22° | 0 mm | 7.2 | |
| Sept. 25 | Sunny | 33° /22° | 0 mm | 7.4 | |
| Sept. 26 | Overcast | 33° /24° | 0 mm | 8 | |
| Sept. 27 | Sunny | 32° /24° | 0 mm | 8 | |
| Sept. 28 | Sunny | 30° /22° | 0 mm | 8 | |
| Sept. 29 | Sunny | 33° /24° | 0 mm | 8 | |
| Sept. 30 | Sunny | 33° /23° | 0 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for Whittier in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Whittier forecast closer to your planned date for the most up-to-date weather information.
Change Month
Whittier in September - FAQ
What are the expected maximum and minimum temperatures in Whittier during September?
During September, expect a variety of temperatures with highs around 29° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Whittier during September?
Rainfall in Whittier during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Whittier during September?
The average wind speed in Whittier during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Whittier
Explore the daily rainfall trends and prepare for Whittiers September weather 💧
Typically, Whittier has 1 rainy days in September with a total of 5.9 mm of rainfall.
UV exposure in Whittier during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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